1020623505 has 72 divisors (see below), whose sum is σ = 1878147264. Its totient is φ = 472887360.

The previous prime is 1020623467. The next prime is 1020623557. The reversal of 1020623505 is 5053260201.

It is not a de Polignac number, because 1020623505 - 2¹¹ = 1020621457 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 959604 + ... + 960666.

Almost surely, 2^1020623505 is an apocalyptic number.

1020623505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020623505 is a deficient number, since it is larger than the sum of its proper divisors (857523759).

1020623505 is a wasteful number, since it uses less digits than its factorization.

1020623505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1105 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1020623505 is about 31947.1987034857. The cubic root of 1020623505 is about 1006.8277770272.

Adding to 1020623505 its reverse (5053260201), we get a palindrome (6073883706).

The spelling of 1020623505 in words is "one billion, twenty million, six hundred twenty-three thousand, five hundred five".